FR1201514A - Fixture for adjusting the background luminance and gradation of an electro-optical reproduction device - Google Patents

Fixture for adjusting the background luminance and gradation of an electro-optical reproduction device

Info

Publication number
FR1201514A
FR1201514A FR1201514DA FR1201514A FR 1201514 A FR1201514 A FR 1201514A FR 1201514D A FR1201514D A FR 1201514DA FR 1201514 A FR1201514 A FR 1201514A
Authority
FR
France
Prior art keywords
gradation
electro
fixture
adjusting
reproduction device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of FR1201514A publication Critical patent/FR1201514A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/202—Gamma control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness
    • H04N5/58—Control of contrast or brightness in dependence upon ambient light

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)
  • Picture Signal Circuits (AREA)
  • Transforming Electric Information Into Light Information (AREA)
FR1201514D 1957-03-09 1958-03-08 Fixture for adjusting the background luminance and gradation of an electro-optical reproduction device Expired FR1201514A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP18118A DE1035198B (en) 1957-03-09 1957-03-09 Circuit arrangement for regulating the basic brightness and the gradation of an electro-optical display device, in particular in a television receiver

Publications (1)

Publication Number Publication Date
FR1201514A true FR1201514A (en) 1959-12-30

Family

ID=7366863

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1201514D Expired FR1201514A (en) 1957-03-09 1958-03-08 Fixture for adjusting the background luminance and gradation of an electro-optical reproduction device

Country Status (5)

Country Link
US (1) US3047656A (en)
BE (1) BE565503A (en)
DE (1) DE1035198B (en)
FR (1) FR1201514A (en)
GB (1) GB891333A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641259A (en) * 1970-08-03 1972-02-08 Hazeltine Corp Flarelight compensator
US5349389A (en) * 1993-04-14 1994-09-20 Rca Thomson Licensing Corporation Video attenuator with output combined with signal from non-linear shunt branch to provide gamma correction and high frequency detail enhancement

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2204992A (en) * 1937-08-20 1940-06-18 Rca Corp Television receiver
US2269590A (en) * 1939-08-02 1942-01-13 Hazeltine Corp Signal-translating system and method of operation
US2264172A (en) * 1939-08-25 1941-11-25 John C Batchelor Television receiver
US2269570A (en) * 1940-03-02 1942-01-13 Hazeltine Corp Adjustable-gamma television signaltranslating stage
GB702321A (en) * 1949-07-21 1954-01-13 Emi Ltd Improvements relating to non-linear electrical control circuits
US2668188A (en) * 1949-12-19 1954-02-02 Rubert S Naslund Television gamma test method and apparatus
GB702359A (en) * 1950-03-22 1954-01-13 Emi Ltd Improvements relating to non-linear electrical circuits
US2804498A (en) * 1950-10-17 1957-08-27 Pye Ltd Gamma control for flying spot scanner
GB709715A (en) * 1950-12-06 1954-06-02 Emi Ltd Improvements relating to non-linear electrical circuits
NL102097C (en) * 1955-09-15

Also Published As

Publication number Publication date
DE1035198B (en) 1958-07-31
BE565503A (en)
US3047656A (en) 1962-07-31
GB891333A (en) 1962-03-14

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